The digestible energy (DE) and prediction models of DE of cottonseed meal for growing pigs were investigated in this experiment, and cottonseed meal were collected in main cotton producing areas of China. Meanwhile, the DE of cottonseed meal samples determined using the substitution method with 15% and 20% replacement ratios of basal diet respectively were studied to explore the effects of different replacement ratios on the evaluation of DE. A total of 18 growing pigs [initial BW: (37.2?1.8) kg] were allotted to three 6 ?6 Latin square designs with 6 periods and 6 diets in each square. Each 6 ? 6 Latin square design diet included 3 kinds of cottonseed meal samples, and each cottonseed meal sample had two replacement ratios of basal diet. Prediction equation of DE of cottonseed meal was established on the basis of measured DE and common composition of cottonseed meal. The results showed that the weighted mean of DE (air-dry basis, DM 90.41%) of cottonseed meal for pigs was 9.94 MJ/kg; the mean of DE (air-dry basis, DM 89.72%) in cotton producing area of Changjiang drainage basin was 9.96 MJ/kg; the mean of DE (air-dry basis, DM 89.86%) in cotton producing area of Huanghe drainage basin was 9.23 MJ/kg; the mean of DE value (air-dry basis, DM 91.30%) in cotton producing area of inland northwest was 10.61 MJ/kg. The recommended prediction model for DE (DM basis) was DE(MJ/kg)=-14.38+0.557?GE+0.320 95?CP-0.012 68?NDF (R2=0.72). In conclusion, the DE determined using the substitution method with two replacement ratios (15% and 20%) has no differences.
ZHU Liang
,
HE Xi
,
LI Ming
,
ZHANG Chengcheng
,
WANG Kaili
,
WU Jin
,
YUE Long
,
YI Mengxia
,
ZHANG Shirui
. Evaluation and Prediction Models of Digestible Energy of Cottonseed Meal Fed for Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2013
, 25(4)
: 819
-826
.
DOI: 10.3969/j.issn.1006-267x.2013.04.020
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